Abbreviation: Drug Fucked Scum. Refers to junkies, misanthropic compulsive liars who would exchange their own grandparents for drugs, and bongtokingalcoholics who will break into your house, steal your car, and then pretend to be your friend so that they can take your money and posessions to buy drugs. DFS have a penchant for getting into trouble from law enforcement, yet also an uncanny knack of weaselling their way out of such trouble.
DFS have anti-social, egomaniacal or narcissistic personality disorders which they disguise as mental illnesses in order to further their own drug habits. They have no empathy, compassion or sense of social responsibility, but will pretend to have such qualities if it will lead them to their next hit of drugs.